Tympan for box cutting and scoring machines.



APPLICATION FILED FEB. 3.-I9II.

Patented Nov. 2, 1915.

HOWARD 1V1. BARBER, OF STONINGTON, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO C. B. COT'IRELL & SONS COMPANY, OF

OF DELAWARE.

NEW YORK, N. Y., A CORPORATION TYMPAN FOR BOX CUTTING AND SCORING MACHINES.

Application filed February 3, 1911.

' To all whom it may concern Be it known that I, HOWARD M. BARBER, a citizen of the United States, and resident of Stonington, in the county of New London and State of Connecticut, have invented a new and useful Improvement in Tympans for Box Cutting and Scoring Machines, of which the following is a specification.

This invention relates to improvements in tympans for box cutting and scoring machines and has particularly for its object to provide a novel device for attaching the steel cutting jacket or tympan to the cylinder of a bed and cylinder machine.

A further object is to provide certain improvements in the construction, form and arrangement of the several parts whereby the tympan may be readily and quickly removed from its engagement with the surface of the cylinder for permitting the application of the make-ready to the surface of the cylinder, means being employed for drawing the tympan snugly down into position on the cylinder.

A practical embodiment of my invention is represented in the accompanying drawings, in which Figure 1 represents in side elevation the impression cylinder of a bed and cylinder box cutting and scoring machinewith the invention applied thereto, a'portion of the jacket being broken away at its hinged end to more clearly illustrate the parts beneath the same, Fig. 2 is a transverse section taken in the plane of the line A--A of Fig. 1, Fig.

3 is an enlarged detail section showing the position of the parts at the hinged end of the tympan in the position which they assume when the tympan is in engagement with the surface of the cylinder, Fig. 4: is a similar view showing the parts in the position which theyassume when the tympan has been swung out of the way for obtaining access to the surface of the cylinder, and Fig. 5 is an enlarged detail section showing the parts at the free end of the tympan which is to be removably and fixedly secured to the cylinder.

The cylinder is denoted by 1 and its impression surface by 2. The usual grippers are denoted by 3. The cylinder is cut away at both ends of the impression surface 2 as shown at 4 and 5. The tympan is denoted by 6, which tympan may be a steel cutting Specification of Letters Patent.

Patented Nov. 2, 1915. Serial No. 666,384.

jacket when the device is used in connection with box cutting and scoring machines. One end of the tympan 6 projects beyond one edge of the impression surface 2 and is fixedly secured to a rock bar 7 mounted in the outer free ends of a plurality of arms 8, the inner ends of which arms are pivotally mounted on a bar 9 extending lengthwise of the cylinder 1 within the same. The free end of the tympan 6 is removably attached to the impression surface 2 of the cylinder adjacent to the grippers 3. In the present instance,the means for attaching the tyn1- pan comprises a longitudinal series of screw bolts 10 and their tightening nuts 11, the bolts 10 passing freely through the walls of the cylinder 1 and being prevented from turning as, for instance, by projections 12.

The means for drawing the tympan tightly against the impression surface of the cylinder comprises a longitudinal series of adjusting screws 13 passing through the rock bar 7 with their inner ends in engagement with the adjacent edge of the impression surface 2. These adjusting screws 13 may be provided with lock nuts 14.

Straps 15 are provided for limiting the swinging movement of the bars 8, each of which straps is securedto one of the cylinder arms by a bolt 16 and has a pin and slot connection 17, 18, with its arm 8. It is desirable that two of these straps 15 be used, one at each end of the cylinder.

Means are provided for limiting the swinglng movement of the rock bar 7, which means, in the present instance, is shown as a plate 19 secured to the arm 8 in the proper position to engage the bar 7 when the tympan is swung to the limit of its outward movement away from the impression surface of the cylinder.

The relation between the hinge bar 7 and the arms 8 is such that the outer face of the hinge bar to which the tympan 6 is attached will be in alinement with the impression surface 2 of the cylinder so that the proper tightening effect may be exerted upon the tympan when its free end is secured to the cylinder.

In operation, supposing the tympan to be swung into its open position, as indicated in Fig. 4:, the make-ready 20 may be pasted onto the impression surface of the cylinder. The tympan may then be swung down into position over the impression surface and its free edge fixedly secured in position by the bolts and nuts 10, 11. After the free end of the tympan has been secured in position, the adjusting screws 13 at the hinged end of the tympan are turned to draw the tympan snugly down against the impression surface.

To remove the tympan from its engage ment with the impression surface of the cylinder, the adjusting screws 18 are first turned to loosen the strain on the tympan and the clamping screws 10. The nuts 11 may then be unscrewed from the clamping screws 10 and the clamping screws removed. The tympan is thenshifted along the cylinder-as far as the links 15 will permit. The tympan may then be swung back away from the cylinder to give ready access to the impression surface 2.

While I have described this invention in connection with a box cutting and scoring machine, I do not wish to limit myself to the useof the tympan in such a connection only but contemplate its use in connection with impression cylinders wherever it can be used.

'What I claim is 1. The combination with an impression cylindenof a tympan having one end removably fixed to the cylinder, a circumferentially movable rock bar secured to the other end of the tympan, having its outer face in alinement with the impression surface of the cylinder and a swinging support for the rock bar.

2. The combination with an impression cyl inder, of a tympan having one end removably fixed to the cylinder, a circumferentially movable rock bar secured to the other endof the tympan having its outer face in alinement with the impression surface of the cylinder, means carried by the rock bar in position to engagethe cylinder for adjusting the circumferentialposition of the rock bar and a swinging support for the rock bar.

3. The combination withan-impression cylinder, of a tympan having one end removably fixed to the cylinderf a circumferentially movable rock bar secured to the other end of the tympan, having its outer face in alinement with the impression surface of the cylinder and arms hinged within the cylinder forming a swinging support for the rock bar. V

4. The combination with an impression cylinder, of a tympan having one end removably fixed to the cylinder, a circumferentiallymovable rock bar secured to theother end of the tympan, having its outer face in alinement with the impression surface of-the cylinder, arms hinged within the cylinder forming a swinging support for the rock bar and means carried by the rock bar in position to engage'the cy iinder for adjusting the V circumferential position of the rock bar.

5. 'i'he combination with an impression cylinder, of a tympan having one end removably fixed to the cylinder, a circumferentially movable rock bar secured to the other end of the tympan, having its outer face in alinement with the impression surface of the cylinder, arms hinged within the cylinder forming a swinging support for the rock bar, means carried by the rock bar in position to engage the cylinder for adjusting the circumferential position of the rock bar, and means for limiting the circumferential movement of the rock bar.

In testimony, that I claim the foregoing as my invention, I have signed-my name in presence of two witnesses, this first day of February A. D. 1911.

- HO WARD M. BARBER. Witnesses: 7

A. R. STILLMA Gr. BURDIOK.

Gopies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. G. 

